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!!!, && Sonic Shaker Portable Vibrating Alarm Clock Model SBP100 GENERAL DATA Power: DC 3V( 1.5Vx2 pieces AA SIZE) & DC1.5V ( 1.5Vx1 pieces AA A SIZE) Made in China INSTALLATION ( See back side for additional directions for settings) 1) HOW TO INSTALL BATTERIES 1.1 Remove the BATTERY COMPARTMENT (10) , insert 1 AAA battery for the clock and insert 2 AA batteries for the vibrator/alarm. 1.2 To insert the batteries, please observe the correct position of the polarity, as marked inside the battery